Darien, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Darien weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain80%0.79″81°70°—
- SundayJul 5Overcast14%—77°66°-4°
- MondayJul 6Overcast——82°67°+5°
- TuesdayJul 7Overcast——86°65°+4°
- WednesdayJul 8Overcast11%—83°64°-3°
- ThursdayJul 9Thunderstorm49%0.20″78°67°-5°
- FridayJul 10Overcast48%—83°65°+5°
AQI 37 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.4 µg/m³ (AQI 47) with a 0.93 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35. Overcast through the UV peak window (cloud cover ~79%) — afternoon ozone should stay flat.
- Present
- AQI 35
- UV peak
- 2.5 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 8.4 µg/m³ (AQI 47) with a 0.93 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:49 PM
- Moonset
- 9:56 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Darien at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60561
16-Day Forecast — Darien
- Sat81°70°80%
- Sun77°66°14%
- Mon82°67°2%
- Tue86°65°1%
- Wed83°64°11%
- Thu78°67°49%
- Fri83°65°48%
- Sat83°65°16%
- Sun71°62°8%
- Mon78°59°8%
- Tue80°63°7%
- Wed83°65°29%
- Thu86°67°25%
- Fri85°71°19%
- Sat89°71°24%
- Sun87°72°33%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Darien
SPC has placed Darien in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Darien
- 60561